WIPER AND WASHER SYSTEM(w/ Rain Sensor) TERMINALS OF ECU

CHECK WINDSHIELD WIPER RELAY ASSEMBLY

1. Disconnect the G85 windshield wiper relay assembly connector.

2. Measure the voltage and resistance according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   G85-2 (IG) - Body ground	L - Body ground	IG power supply	Ignition switch ON	11 to 14 V
   			Ignition switch off	Below 1 V
   G85-25 (W) - Body ground	SB - Body ground	Front washer switch circuit	Front washer switch on	Below 1 Ω
   			Front washer switch off	10 kΩ or higher
   G85-8 (VR2) - G85-21(VR1)	Y - W	Adjusting volume circuit	Windshield wiper switch adjusting ring* changed	0 to 231 Ω
   G85-12 (E) - Body ground	W-B - Body ground	Body ground	Always	Below 1 Ω

   *: The rain sensor sensitivity can be adjusted by the windshield wiper switch adjusting ring.

3. Reconnect the G85 windshield wiper relay assembly connector.

4. Measure the resistance according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   G85-10 (+1) - Body ground	G - Body ground	Front wiper motor low speed signal circuit	Front wiper motor off	Below 1 Ω

5. Measure the voltage and check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   G85-1 (+SM) - Body ground	G - Body ground	Front wiper motor position detection signal	Front wiper motor in low or high operation	Below 1 V ←→ 11 to 14 V
   			Front wiper motor off	Below 1 V
   G85-3 (C1) - G85-5 (C0)	GR - L	Windshield wiper switch assembly AUTO signal circuit	Ignition switch ON, windshield wiper switch assembly in AUTO	Below 1 V
   			Ignition switch ON, front wiper switch off	11 to 14 V
   G85-25 (W) - Body ground	SB - Body ground	Front washer switch circuit	Ignition switch ON, front washer switch on	Below 1 V
   			Ignition switch ON, front washer switch off	11 to 14 V
   G85-10 (+1) - Body ground	G - Body ground	Front wiper motor low speed signal circuit	Front wiper motor in low operation	11 to 14 V
   G85-11 (+2) - Body ground	R - Body ground	Front wiper motor high speed signal circuit	Front wiper motor in high operation	11 to 14 V
   			Front wiper motor off	Below 1 V
   G85-14 (MPX1) - Body ground	V - Body ground	Rain sensor signal	Ignition switch ON	Pulse generation
   G85-24 (SPD) - Body ground	B - Body ground	Speed signal	Ignition switch ON, wheel being rotated	Pulse generation (See waveform 1)

   1. 

      Waveform 1 (Reference):

      Item	Condition
      Terminal No. (Symbol)	G85-24 (SPD) - Body ground
      Tool Setting	5 V/DIV., 20 ms./DIV.
      Condition	Ignition switch ON, wheel being rotated

      Tip:

      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

CHECK HEADLIGHT CLEANER CONTROL RELAY (w/ Headlight Cleaner System)

1. Disconnect the A48 headlight cleaner control relay connector.

2. Measure the voltage and resistance according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A48-1 (HDLO) - Body ground	BR - Body ground	Low beam headlight operation signal	Low beam headlights not operating	11 to 14 V
   			Low beam headlights operating	Below 1 V
   A48-3 (IG) - A48-4 (E)	L - W-B	IG power supply	Ignition switch ON	11 to 14 V
   			Ignition switch off	Below 1 V
   A48-4 (E) - Body ground	W-B - Body ground	Body ground	Always	Below 1 Ω
   A48-6 (PB) - A48-4 (E)	B - W-B	Headlight cleaner motor operation signal	Ignition switch off	11 to 14 V

3. Reconnect the A48 headlight cleaner control relay connector.

4. Measure the voltage and resistance according to the value(s) in the table below.

   Tip:

   The standard normal voltage between each pair of the headlight cleaner control relay terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of the terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the headlight cleaner control relay terminal locations.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A48-5 (FRWA) - A48-4 (E)	W - W-B	Front washer switch signal	Ignition switch ON, front washer switch off	11 to 14 V
   			Ignition switch ON, front washer switch on	Below 1 V

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*A	Main Body ECU (Multiplex Network Body ECU) with 1 Connector	*B	Main Body ECU (Multiplex Network Body ECU) with 3 Connectors
*1	Main Body ECU (Multiplex Network Body ECU)	-	-

1. Remove the main body ECU (multiplex network body ECU).

   for LHD:Click here

   for RHD:Click here

2. Connect the instrument panel junction block assembly connectors.

3. Measure the voltage and resistance according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A-30 (BECU) -Body ground	None - Body ground	Battery power supply	Always	11 to 14 V
   A-29 (ACC) -Body ground	None - Body ground	ACC power supply	Ignition switch ACC	11 to 14 V
   			Ignition switch off	Below 1 V
   A-32 (IG) - Body ground	None - Body ground	IG power supply	Ignition switch ON	11 to 14 V
   			Ignition switch off	Below 1 V
   A-11 (GND1) - Body ground	None - Body ground	Body ground	Always	Below 1 Ω

4. Install the main body ECU (multiplex network body ECU).

   for LHD:Click here

   for RHD:Click here

5. Measure the voltage according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   3B-37 (HRLY) - Body ground	BR - Body ground	Low beam headlight signal	Light control switch in head position	Below 1 V
   			Light control switch off	11 to 14 V